I'm currently getting this response on some (not all) emails sent from GMail under my fitoutfinance domain Can any of you good folk shed any light? Message not delivered You're sending this from a different address or alias using the 'Send mail as' feature. The settings for your 'Send mail as' account are misconfigured or out of date. Check those settings and try resending. BTW, I've checked settings & can't see the problem - but I'm not very techy!